Sct Focal Reducer Comparison

You see, its baffle tube diameter was 27mm, which is the same as the maximum field stop for a 1. Notice how many more stars are visible Frank's image. It makes no sense to reduce a 2000 to 3000 mm focal length telescope to under 1000 mm with a focal reducer since the optical quality of the image suffers significantly. There are few scopes that take great photos without the bit of glass up the camera end to sort everything out. Celestron F/6. However, for focal reducers, the price can become an issue if I decide to buy several. For an 8" ƒ/10 SCT with ƒ 1 ~400mm, the focus shift between ψ=0 (object at infinity) and ψ=0. Note that when. 3 Exposure is Equivalent To 50 Seconds F/10 Exposure In Camera). 5X Faster Than F/10 System. The SCT Corrector LF is designed to increase the available backfocus compared to Starizona's standard SCT Corrector. Starizona 0. 3, plus an additional f/2. Reductorul pur şi simplu se înşurubează în ocular sau în adaptorul de camera web. Relate optical and mechanical parameters of simple lenses in order to ease integration into application assemblies. The camera side connection is a standard M42 T-thread. 5x TS focal reducer (screwed into the camera) and 1. Caldbeck Observing Site Survey. When I finally got 0. 95" Travel, Focal Reducer Drawtube & Brass Compression Ring in RED Colour. Based on this combo I should be operating a f4. Results may vary slightly depending upon the imaging train configuration. Enjoy the wider field of view & faster exposure times at f/6. The camera side connection is a standard M42 T-thread. 3 Reducer Corrector for C Series Telescopes. In comparison to conventional crayford or rack & pinion drives, this micro-geared movement has zero backlash, zero cogging, and zero flxure ; Diamond Steeltrack 2" focusers lift a payload of 6kg (13 lbs) straight up, without slipping, without excessive bearing preload (bearing preload can be increased further if necessary). Let us take a 75mm focal length x2 (nominal) Barlow used at its designed amplification. The actual focal length reduction will vary a little over or under 0. The example is calculated with an f/2. 3 Focal Reducer/Field Flattener #07545. I tested the following two configurations: (1) f/6. 71x) EF mount. Focal segmental glomerulosclerosis (FSGS), also known as "focal glomerular sclerosis" or "focal nodular glomerulosclerosis," is a histopathologic finding of scarring (sclerosis) of glomeruli and damage to renal podocytes. These very seldom come up for sale in either Japan or western markets. Although originally developed for the Explore Scientific ED-APOs 127mm and 152mm, the reducer can be used with many systems. 25" 6mm - 40mm Meade Super Plossel Set: 1. Caldbeck Observing Site Survey. Focal Reducers for Refractors. 3 reducer works well visually or photographically. Celestron F/6. It could reach focus without problem, the field of view seems sharp, but the magnification is too low to tell the quality, also, terrestial targets are not suitable to really. 7 arc-minutes. You still end up having to use another set of optical elements in the form of a field flattener to improve the performance. 3 Focal Reducers for Compound Telescopes. While it doesn't change the actual focal length of the scope, it does change the effective focal length. I don't remember which brand of focal reducer we tested but I did do a comparison between a cheaper focal reducer vs the metabones speed booster. One accessory suggested is the Focal Reducer by Celestron (NOT INCLUDED, SOLD SEPARATELY!) will reduce the focal ratio of this optical tube to an f/6. It is a 120 mm apochromatic f/7. A good year ago, Aputure introduced their DEC wireless focus & aperture adapter. Focal Reducers. You ain't seen nothin 'till you've looked thru the EYEOPENER. This is due to, even after polar aligning and a two star alignment, at subs around 30 Secs i am still getting slight elongation to the stars. A high-quality, non-focal-reducing Field Flattener optimised for DSLR imaging on refractor telescopes with focal ratios around f/5. Drop a Meade Series 4000 56mm Plossl 2" eyepiece (52-degree AFOV) in our 800mm telescope and the true field of view is a whopping 3. Nous vous remercions de votre patience. This allows the choice of an additional f/3 or f/5 focal ratio with an f/10 SCT and an additional f/1. 3 Focal Reducer SCT Telescopes: Price: $150 Posted on: 2021-01-23 00:32:32 Last Updated on: Contact: markchech86 (user details & view my other ads) Phone Number (optional): Not provided. The f/10 to f/11 focal ratio range represents a sort of "sweet spot" for general purpose, Schmidt-Cassegrain astronomical telescopes. Using a Celestron or Meade f/6. For Meade Schmidt-Cassegrain models. Comparison with. All Product Information Customer Q&As Customer Reviews. The Antares f/6. În primul rând aceste se utilizează la observarea obiectelor mari, mai ales dacă instrumentul are distanţa focale lungă. Quoting from a 1990 brochure: "Each set of optics is hand figured to deliver 1/8 wave to the film plane employs an oversized 235 mm primary mirror. I tried the Lens Turbo with MF Pentax 67 165mm F2. 25″ holder : Camera. Afocal adapter for point and shoot camera. It makes no sense to reduce a 2000 to 3000 mm focal length telescope to under 1000 mm with a focal reducer since the optical quality of the image suffers significantly. The focal reducer is only for full frame lenses used in APS-C mode on the Sony full frame VG900, A7 and A7r. 33 focal reducer and a crayford two speed focuser and the vignetting was very severe when I used my DSLR. For the visual astronomer, they'll be pleased to know this optical tube. These very seldom come up for sale in either Japan or western markets. 5x is threaded to screw onto any 1. Compare this measurement with the manufacture value. 7x Celestron focal reducer for the 8" Edge scope, while still leaving you with enough back focus for whatever you need. It also has an adapter to use without the reducer when wanting to use the scope at f/10. 25 EdgeHD SCT. To see how various eyepieces will perform on an SCT click here. For example, an 8" telescope with an f/10 focal ratio has a focal length of 2000 mm (=200 mm x 10). Although I have already done a focal length comparison from 12mm to 500mm focal length before, I decided to do it once again for telephoto lenses. Here are three images of a MFR-5 focal-reducer. 8x Reducer/Flatener for TV-85 and TV-76; and the Celestron Reducer/Corrector f 6. 75x photographic reducer, gives a reasonable fast focal ratio of f/5. Both of these adapters offer a wider field of view when used with smaller sensor cameras (i. Focal reducers for wider field imaging and visual applications. 72x 35 Optical, mechanical, and cosmetic condition are all excellent. The Paul Rini reducer is mounted by a 2" nose piece - the rear coupling is a T-Thread. The Antares f/6. With a 2000mm focal length f/10 telescope like a 8" SC or 8" ACF, both the Antares reducer and the Meade reducer yield a 1260mm focal length f/6. Quick View. Backfocus is 132mm (5. 7x - EdgeHD 1100 The EdgeHD. Tele Vue Nagler Series Eyepieces, Type 6, 82º Field of View, Type 6 Naglers are available in 2. 85x and provides much-improved field-edge correction. They sold the patent to generate funds a few years ago and that's why we are seeing the boom of focal reducers. The Meade f/6. The Antares f/6. 63x - for Schmidt-Cassegrain Telescopes. ) There are two other sites that you may also find helpful for CCD cameras. With a 2000mm focal length f/10 telescope like a 8" SC or 8" ACF, both the Antares reducer and the Meade reducer yield a 1260mm focal length f/6. Imaging Accessories. 63x SCT focal reducer, GSO 1. It was design for video ccd sensor ranging size from 1/2 inch to 1/3 inch and 1/4 size. If offers wide fields of view with any Schmidt-Cassegrain telescope. For example, an 8" telescope with an f/10 focal ratio has a focal length of 2000 mm (=200 mm x 10). The focal length is part of another formula which allows for calculating the focal ratio of a telescope. 3 Focal Reducer/Field Flattener for Meade Schmidt-Cassegrain models, improves edge-of-field correction and reduces exposure times by close to 50%. TS-Optics Optics TSRED052 Focal reducer 0. 7x BAVEYES PENTAX645-SONY E 0. Read more. Find many great new & used options and get the best deals for Hirsch f/6. 5 and speed is increased 2. Comparison of Vesta Pro and 1004x using standard exposures. The lens replaces the secondary mirror on Fastar-compatible 11" SCTs and turns the telescope into an f/1. I will see how the Focal Reducer performs on the GH4 once I have it. 3 Series 4000 Focal Reducer/Field Flattener with the Antares f/6. 2020 popular 1 trends in Consumer Electronics with Focal Reducer Speed and 1. Black anodized alumium, interior is baffled. Works on all sensor and sCMOS and CMOS sensor as well. This formidable instrument produces razor-sharp, false color-free views, highly suitable for astrophotography and visual observing. It also allows using the 36. Note: This reducer is compatible with 5", 6", 8", 9. NGF-SE+small SCT Adapter+f6. here is my setup using only 2 lenses Nex 6 (APS-C). 25" oculars are typically limited to 40mm. The auction can be found here on [shoplink 18056 ebay]eBay (Click…. Backfocus is 132mm (5. Rosen focal reducer adapter. Read more. Koinca Hexanon AR 35mm/f2. Pour les articles homonymes, voir FORS. Below is shown the effect of such random lens with a perfect 1000mm f. Integral T-Ring adaptor thread. La caja estaba muy bien empaquetada y cuando la abrí descubrí…. Kipon did yet not unveil how much these will cost and when they will ship. 3 Focal Reducer/Field Flattener The Meade. 7x factor to the original lens focal length with a gain of one stop in lens speed. 3 CCD Focal Reducer attaches to the rear cells of all Meade LX-Series Schmidt-Cassegrains and to other SCT brands and reduces CCD exposure times by up to 80%. Custom counterweight. Alternatively you could purchase a screw on focal reducer and field flattener. 72x Focal Reducer on the Blackmagic Design Pocket Cinema Camera. FC-100DL The FC-100DL is a full-fledged long focal length apochromatic refractor from Takahashi. After some research I started seeing info regarding the limitations of smaller FL guide scopes on a larger FL optical tube, ie the Orion 50mm only working up to ~1500mm FL OTA's, meaning I would need a f/6. Of course, you know the flaw in this reasoning - everything the C8 does, a C9. The diagram above shows how the SCT Corrector II improves the off-axis spot size on a Celestron 11" SCT. 3 focal reducer/field flatener is installed, it becomes a very fast system for use with my MallinCam Video CCD Cameras. 66X reduction in focal length. 25 with the f6. Read more. Compare with similar items. 3 SCT Focal Reducer £84. The HyperStar 11 system allows extremely fast, wide-field CCD imaging with the Celestron 11" SCT. 63: f/10 telescopes are converted to f/6. The remaining vignetting is minimal and limited only by the telescope baffles. Not sure if SCT 8 is the best for astro photography. GSO 200mm and TEC 140 APO Comparison. Using a Celestron or Meade f/6. Reflections are increased. FORS (focal reducer and low dispersion spectrograph) est le nom de deux spectro-imageurs de l'Observatoire européen austral. Threads into rear cell of any Meade SCT. To the naked-eye, the comet's brightness did not seem to change during this period. Hence, the specifications for a typical telescope, for example the ubiquitous Celestron C8, are as follows: 8" (203mm) clear aperture, 2032mm focal length. Quick View. However the focal reducer does not have to be installed, so the tall focal reducer style flange can be picked if the scope is to be used for both visual and imaging. 63x SCT focal reducer, GSO 1. 7x reducer as well. A good year ago, Aputure introduced their DEC wireless focus & aperture adapter. I am using an 8" SCT f/10 (2000mm FL). 3 imaging platform with a 44 mm image circle. 7x Focal Reducer Lens makes your EdgeHD 9. 2" Klemme): 1. : 56061 Manufacturer: Vixen. For Meade Schmidt-Cassegrain models. Or maybe an 8" SCT? Is someone using a similar scope? What are advantages and disadvantages of the different scopes regarding VS observing? Compact, portable, but expensive and with a mere 0. 3 on an f/10 SCT. As a comparison, the standard DSMC2 S35 canon mount Aluminium is $700 USD and $2000 for the Titanium version. This is due to, even after polar aligning and a two star alignment, at subs around 30 Secs i am still getting slight elongation to the stars. The ED80 was piggy-backed on a 10 inch Meade LX200. The name of the model comes from the initials of the three additive primary/secondary colors, red, green, and blue. 7x - EdgeHD 925. 25" oculars are typically limited to 40mm. Series 4000 f/6. This method cannot be used to find the focal length of a concave lens because the image is “virtual”, see figure below. 5x Barlow 1. 25 comparison: NexStar8SE: Antares 0. 8 (Canon EOS EF mount) on Micro Four Thirds camera Lumix G2 review (test). 0 ND110 Vs Camdiox ND1000. These cheap focal reducers are designed to work best in refractors, SCT's and Maks. This focal reducer is designed for Vixen's VMC200L, VMC260L and VMC330L reflector telescopes. , Meade or celestron f6. 5 refractor: the William Optics 2inch APO 0. It was design for video ccd sensor ranging size from 1/2 inch to 1/3 inch and 1/4 size. 3 for SCT telescopes. High Point 1. Koinca Hexanon AR 35mm/f2. Description of the reducer. Samples taken with Focal Reducer 0. 5 focal reducer @ 8 seconds NGC7394 (open cluster) - 08/26/2011 - 6" RC f5, StellaCam-3 and. Now for the oldie-but-goodie Televue TRF2008 flattener/reducer for the TV85, which is designed for 400mm - 600mm focal lengths. BA0027 – T Adapter for SCT 52,80 € incl. As it's name implies, it is a large and substantially constructed device which weighs nearly 2-1/2 lbs with the lens installed. This will only work on a moving mirror SCT scope. Reduces the focal length by the factor 0,7x (for f/8) and 0,8x (for f/10) respectively. Focal reducers for wider field imaging and visual applications. 66X Reducer. Add to Compare. 5" Dob, but I wanted the portability afforded by this scope. Enjoy the wider field of view & faster exposure times at f/6. All existing Edge HD T-adapters can be used with the reducer for astrophotography. 25 with the f6. Antares' f/6. 3 Focal Reducer/Field Flattener for Meade Schmidt-Cassegrain models, improves edge-of-field correction and reduces exposure times by close to 50%. This item Meade Instruments 07545 LX f/6. 4x SCT Reducer/Corrector December 16, 2019 by Stuart Parkerson 0 comments Starizona Night Owl offers a 0. 63x focal reducers were originally designed to optimize for an image circle to match 36mm x 24mm film or its digital equivalent for astrophotography. 3 focal reducer for F/10 SCT, visual or imaging. This page compares several focal reducers for use with the Orion ED80 FL=600mm f/7. 3 CCD Focal Reducer attaches to the rear cells of all Meade LX-Series Schmidt-Cassegrains and to other SCT brands and reduces CCD exposure times by up to 80%. 3 CCD focal reducer is a variable T-adapter. Focal reducers for refractors must be matched to the focal length of the instrument due to the relationship between focal length and field curvature. This focal reducer from Celestron reduces the effective focal length by 0. Starizona Night Owl. So it provides a 0. Focal reducer lens, on the other side, can also serve the purpose of obtaining more magnification options, but is The SCT reducer produces off axis spots larger than the R&V cemented doublet, but its actual Next, an illustration of performance level of the common f/6. 63 reducer to shoot deep space target, horsehead. 9 imaging system!. 25″ webcam nosepiece and provides a nominal reduction in magnification of 0. meade focal reducers for telescopes. 5 cm) f/10 SCT with Trifid Fastar Sec. Hi, I've a fujifilm camera with apsc sensor and I want to convert it in a full frame with speedbooster system. Dylan, If you have an older C925 then the reducer (x0. As the name implies they effectively reduce the focal length of your telescope. Although I have already done a focal length comparison from 12mm to 500mm focal length before, I decided to do it once again for telephoto lenses. Focal Reducers. 3, reducing exposure times by about 60%. Optimized for the Sky-Watcher BLACK DIAMOND ED120, this superb quality accessory effectively reduces the telescope’s focal length by a factor of 0. This new 7-element design update for the short focal length Nagler deserves its own designation. 9x, respectively. I have been fortunate to have a TEC 140 APO refractor for imaging. For all Schmidt-Cassegrain telescopes; not for EdgeHD models. 3 focal reducer / field flattener for use with my new LX200R. This enables CCD. 3 Focal Reducer/Corrector lens. 7x - EdgeHD 1100 The EdgeHD. TEC-APO140 to EdgeHD9. Philipp Keller (Germany). 75x photographic reducer, gives a reasonable fast focal ratio of f/5. "Playing With Focal Ratio 2", 1. Levels stretched in GIMP. 172mm Focal Reducer. 3, plus an additional f/2. Focal Length: focal length of the telescope's primary mirror or lens, in mm. The focal length is reduced and the field is corrected. Compare with similar items. It could reach focus without problem, the field of view seems sharp, but the magnification is too low to tell the quality, also, terrestial targets are not suitable to really. The 12" f/10 Meade SCT image is a tri-color image taken by Frank Loch using an SBIG ST-7 CCD camera. 49X, 2" focal reducer, MallinCam 2. 5 system focal ratio, close to the design values a competitor used. Here is a review of the Kipon Baveyes medium format lens focal reducer adapter for Sony A7 cameras. Focal Reducers. (This isn't to say that the AP reducer is bad, just not particularly optimized, apparently, for use with an RC. 2 focal ratio with an f/6. Focal Reducers. I used to have a C9. 3 : Mount: Schaefer GEM - 7 1/2: Guiding: 80mm f/11 guidescope with PHD Guiding : Camera: Canon 20Da: Exposure: 144 subexposures of 180 seconds at ISO 1600 - over 7 hours of total exposure: Calibration: 30 darks, 30 flats, 30 bias : Date: November 21 and 25. 2 in the C11, for a speed increase of 2. I receive quite a few emails from our readers, asking about telephoto lenses and focal lengths. The Celestron Focal Reducer is made of top quality glass and it's body and finish are solid. The focal length reduction increases the speed of the optical system for astrophotography. This anodized, machined aluminum 1. It reduces the telescopes focal ratio by a factor of 0. 3 for C5, C8, C9¼ and C11 telescopes and f/7. For my 4SE I use a Baader adapter no: 2958500. Eng Test Report - Sep. OPT provided the two SCT Focal Reducers for this comparison. 85x Focal Reducer is a useful accessory for astrophotographers who want improved field edge correction. For Meade Schmidt-Cassegrain models. 9x, respectively. Another good SCT focal reducer is made by Hirsh; however, the Celestron seems to get better reviews. 25 and the Canon EOS 550D: Project Cones in M42: Project Moon Illusion: Celestron EdgeHD 1100 and the SBIG ST-8300M: Optec Lepus 0. 00 USD Item Location British Columbia (Canada) Item Description Focal Reducer Speed Booster Adapter Pentax K PK Lens to Micro 4/3. A T to 2" adapter fits to this - the one shown is an Antares T to SCT female to SCT male to 2" focuser - this type allows you to couple in a standard SCT focal reducer, i. 8x reducer and flattener meets the needs of demanding astrophotographers who use cameras with up to full-frame sensors for wide-field deep-sky imaging. 3 Focal Reducer/Field Flattener (4-element, 41mm diameter, multicoated lens elements) # 07545 threads on to the rear cell of any Meade SCT telescope or to other Schmidt-Cassegrain telescope brands. Kipon adapters are also sold at Amazon and eBay. 2 the focus ring turns to infinity. We will kick off with the newer class of lens convertor. 63, which reduces exposure times and simplifies astrophotography while improving edge-of-field resolution by flattening the telescope’s field. Celestron SCT Optical Tubes. The exact focal length of the reducer/telescope combo depends slightly on where in the optical path the SCT Corrector lens is placed. 99 buy DETAILS This superb fully multi-coated multi-element focal reducer takes advantage of the latest computer aided design techniques to achieve the highest standards of performance set by the brand leaders at a fraction of the cost. Threads into rear cell of any Meade SCT. 3 for C5, C8, C9¼ and C11 telescopes and f/7 for the C14 telescope. 3, the distance between the CCD and the back of the focal reducer element is a critical distance that will make a big difference in the image. I first did some visual tests with the focal reducers on the 8" LX200-ACF. For example, an f/6. 8 degree field of view, unless you introduce another expensive focal reducer. It has a wonderful focuser, and when used with the Astro-Physics 0. 2 reduction on my Celestron C8, so you won't get quite as wide a field as with the Celestron/Meade ones at f/6. In comparison to conventional crayford or rack & pinion drives, this micro-geared movement has zero backlash, zero cogging, and zero flxure ; Diamond Steeltrack 2" focusers lift a payload of 6kg (13 lbs) straight up, without slipping, without excessive bearing preload (bearing preload can be increased further if necessary). I wonder if this one has the same optics as the RJ camera models. A focal reducer is a little piece of magic between two lens mounts. Improves edge-of-field correction and reduces exposure times by close to 50%. Descubrí la mejor forma de comprar online. Also present in the system are: (d) means to correct the sum of the spherical aberation of all the spherical mirros in the entire system and (e) an aperture stop. In 1982, I took the SCT plunge. The precise focal length of this reducer/corrector and telescope combination is somewhat contingent upon the exact placement of the SCT Corrector lens in the optical path. This makes the telescope a "faster" system with a wider field of view and brighter objects, requiring shorter exposure times when doing astrophotography. Recently, we were testing eyepieces for side-by-side comparison and decided to try something else fun. 4x Reducer 0. 72x Focal Reducer on the Blackmagic Design Pocket Cinema Camera. This page compares several focal reducers for use with the Orion ED80 FL=600mm f/7. Focal lengths are generally about 5 times the length of the tube so in that sense expect F10/11/12 or more depending. 3 for C5, C8, C9¼ and C11 telescopes and f/7 for the C14 telescope. 3 reducer/corrector, 0. 25" Orthscopic Eyepieces 12 & 18 mm: Olympus 3020 Digital Camera: 2" 30mm 1rpt ST80: Meade F3. But I'll take the round stars any day over the slightly narrower field of view and slower optics. 3 focal reducer: 2" Orion DeepView 42mm. Starizona has updated their popular SCT Corrector! By modifying the optical design of the SCT Corrector based on the 4-element design of the large-format SCT Corrector LF model, they were able to increase the focal reduction from f/7. Please enter the desired length of camera adapter in the Item Message field and select the required thread size in the drop down menu. This ensures the best optical performance. Descubrí la mejor forma de comprar online. The new Starizona SCT Corrector requires the proper camera adapter to achieve the correct lens-to-CCD distance. 3 : Mount: Schaefer GEM - 7 1/2 Byers Gear: Guiding: 80mm f/11 guidescope with PHD Guiding : Camera: Canon 450D - Gary Honis modified: Exposure: 155 subexposures of 180 seconds each at ISO 1600 - 7 3/4 hours total: Calibration: 30 darks, 30 flats, 30 bias. Improve your night sky views with these telescoping accessories. Using a focal reducer for wide field only works if you are restricted to 1¼" eyepieces. Of course, you know the flaw in this reasoning - everything the C8 does, a C9. For Meade Schmidt-Cassegrain models. 3 Focal Reducer Kit. Focal Reducer and Field Flattener Combos. Focal length, image sensor format, lens optical format, image circle and Field of View are explained to show you how cameras work and how to choose a lens. We offer a wide selection of telescope field flatteners, reducer correctors, and more. 25 with the f6. Ideal for cleaning All MallinCam focal reducers including MFR-5, MFR-3, 0. For customers with special needs, we have provided a customer support phone number reachable 24 hours a day, 7 days a week, 365 days a year: (800) 720-6364. Spacing is 1/2 inch, center opening is 1. Focal length: 30 mm Apparent Field of View: 80° Fully multi-coated Barrel: 2" / 50. This makes deep-sky photography with astro cameras possible. 5x faster than SCT's native f/10; 1. Focal Reducer - posted in ETX Series: I have an ETX-105. 66X Reducer. Comparison with. 5x is threaded to screw onto any 1. 3, reducing exposure times by about 60%. here is my setup using only 2 lenses Nex 6 (APS-C). I've a lot of broken old lenses - can I diy a focal reducer with vintage spares lens ? I've seen on internet a dude that construct a focal reducer from Russian binoculars and use it for astronomy. High quality CNC machined body with gloss black anodised. Celestron C-8 SCT - Celestron C-8 SCT (2000mm, 1260mm w/focal reducer) Jupiter with the Great Red Spot 1/3/12 at 19:55 PST Lagoon, Trifid, Eagle, Swan, and Milky Way Center HaRGB Mosaic. Focal Reducer test: Celestron SCT f6. “ Bellow is comparison table made according to Brian’s proposal. 3 focal reducer Trifid Nebula. Some units of Meade's so-labeled "f/6. Photographers often conflate focal length and angle of view because it happens to work out much of the time. Threads into rear cell of any Meade SCT. 5 and speed is increased 2. I fitted it as first object on the scope before putting the microfocuser on top, since that was the only way that any connector screw threads seemed to work. Unlike in conventional units, microfocal dimensions depend on accelerating voltage, tube current, variations in power supplies of focussing. Starizona Night Owl 0. Celestron Reducer Lens. I receive quite a few emails from our readers, asking about telephoto lenses and focal lengths. 5x focal reducer for any webcam type imaging camera increases imaging area by a factor of 4. It is the same as the aperture times the telescope's f/ ratio. com with top-selling 1 brands. 3 Reducer For Schmidt Cassegrain Telescope. Shifting the image plane outward will provide additional reduction but a loss of star quality at the edge of the images. The fastest ultra-wide lens combo for MFT or M4/3 camera available in retail!. 25″ webcam nosepiece and provides a nominal reduction in magnification of 0. 5X Focal Reducer The 0. There are M48 threads on the telescope side for using a standard 2″ filter. 25" Filter: ZWO R, G, B Focuser: ZWO EAF Autoguiding: ASI120 Mini attached to an Agena 50mm Guide Scope/ZWO 60mm Guidescope Exposure: R 56 x 90, G 62 x 90, B 56 x 90 Gain: 139 Offset 21 Temp: 0 C. Focal reducers. 7x Reducer 0. The ST-5C focal reducer is designed to reduce the focal ratio of an F/10 telescope to F/4. 3 for C5, C6, C8, C9¼ and C11 telescopes and f/7 for the C14 telescope. I bought the Roxsen Focal reducer, cheap I know, but it seems very sharp and up until now has been impressive. 3 reducer I find seems to also correct the image aswell. 25" zenith prism. VILTROX EF-M2 II Focal Reducer Booster Adapter Auto-Focus 0. 75x photographic reducer, gives a reasonable fast focal ratio of f/5. Focus a far object (distance > 100 x focal length), onto a piece of paper, see figure below, and measure the focal length. Celestron 14 - xaxt. Focal reducer lens, on the other side, can also serve the purpose of obtaining more magnification options, but is The SCT reducer produces off axis spots larger than the R&V cemented doublet, but its actual Next, an illustration of performance level of the common f/6. 71x) EF mount. APS-C can nearly restore equivalent FF field of view by using a FF lens with a. Includes brass compression ring with thumbscrew. It s a two-piece design and is made to mount on C-mt. 3 SCT Focal Reducer w/Box, IB & Accessories Taylor Strand P2 (SCT 4. 3 and 80mm refractor (2008 article) May 14, 2013 - Focal Reducer Test (2008) Using the Celestron SCT f6. 3 effective focal ratio (EFL) on native f/10 systems. F/8 is unusual, but not unheard of and I know meade has made them for a few years now. 3 focal reducer provides a faster f/6. f/11 telescopes, such as the C14 will perform at f/7. Improve your night sky views with these telescoping accessories. The transformation results in a 0. Quoting from a 1990 brochure: "Each set of optics is hand figured to deliver 1/8 wave to the film plane employs an oversized 235 mm primary mirror. Therefore, I've attached the reducer to the 2" visual back via a 2"->SCT adapter, and then I use a 2" SCT visual back after the reducer and to connect to the eyepiece. Shop B&H for our huge inventory of Focal Reducers & Field Flatteners from top brands like Vixen Optics, Celestron, Sky-Watcher and Tele Vue, at great prices. Download sct focal reducer for FREE. For a thin lens in air, the focal length is the distance from the center of the lens to the principal foci (or focal points) of the lens. Antares' f/6. 72x and compared to Olympus Zuiko 12-60 mm 2. The Starizona Night Owl is a 4-element reducer designed to increase the field of view on standard SCT telescopes (not EdgeHD or ACF models) by 2. 3 reducer is designed to reduce the focal ratio of an f/10 SCT to f/6. 172mm Focal Reducer. Optimized for the Sky-Watcher BLACK DIAMOND ED80, this superb quality accessory effectively reduces the telescope's focal length by a factor of 0. 4x-SCT-reducer/corrector creates a very well corrected image field and improves the aperture ratio of your Schmidt-Cassegrain telescope from f/10 to f/4 (C14 from f/11 to f/4. 2 in the C11, for a speed increase of 2. 25" zenith prism. Rosen focal reducer adapter. Illuminated Reticle Eyepieces. For a thin lens in air, the focal length is the distance from the center of the lens to the principal foci (or focal points) of the lens. The ratio of the focal lengths is 5, so bin the image from the SCT 5x5 pixels and you would have the same resolution on the subject with 5. It makes no sense to reduce a 2000 to 3000 mm focal length telescope to under 1000 mm with a focal reducer since the optical quality of the image suffers significantly. With the Speedmount, you then reduce the focal length by 0. focus & aperture control. Image below; MFR-5 Dual Cells Focal Reducer Corrector. Focal Reducer test: Celestron SCT f6. În primul rând aceste se utilizează la observarea obiectelor mari, mai ales dacă instrumentul are distanţa focale lungă. One way to get around this is to use a focal reducer, which I have always found cumbersome: remove diagonal, screw in focal reducer, replace diagonal, insert eyepiece — repeat procedure again and again, as required. The 14" f/3. Based on Separation of Eyepiece Focal Plane and Barlow. However, I was unable to reach a focus. 95 draw tube and the focal reducer screws inside this and only screws on one way so you can't get that wrong. It was design for video ccd sensor ranging size from 1/2 inch to 1/3 inch and 1/4 size. 0 ND110 Vs Camdiox ND1000. I believe their motivation for doing so is to hit the imaging crowd. com with top-selling 1 brands. The Takahashi TSC-225 has the reputation of being the finest SCT ever commercially produced. The Paul Rini reducer is mounted by a 2" nose piece - the rear coupling is a T-Thread. A couple of references are cited below for a better understanding of the placement with other cameras or accessories. ED80 Focal Reducer Comparison and Shootout. Quick View. Inside the case is the focal reducer with caps on both ends. Series4000TM f/6. Focal reducers. Celestron Nexstar 6SE, stock alt/az mount, Meade. Also how about the fotodiox focal reducer excel+1? i read some bad things about it, but they were from a long time ago, maybe the new ones are fixed. 6X reducer/corrector, which was never designed for full frame:. Add to Compare. 75x photographic reducer, gives a reasonable fast focal ratio of f/5. 28" thread are commonly referred jointly to as a 3. For example. Antares' f/6. 3, which is not great, but usable for photography. Pour les articles homonymes, voir FORS. 3 while preserving the optical performance and keeping. 33 focal reducer and a crayford two speed focuser and the vignetting was very severe when I used my DSLR. Threads into rear cell of any Meade SCT. The 7-element, Nagler Type 6 design is based on the original patented Nagler design. com offers 1,682 focal reducer products. As a starting point of comparison, note that I use EPs that give me 0. Based on Separation of Eyepiece Focal Plane and Barlow. 25″ screw in focal reducer. 8x Flattener; the TeleVue #TRF-2008, 0. 3 on an f/10 SCT. The RGB color model is an additive color model in which red, green, and blue light are added together in various ways to reproduce a broad array of colors. May be used to increade field of view and reduce magnification for visual applications. 5, at the limit of what is conventionally considered as “photographic range”. Using a focal reducer for wide field only works if you are restricted to 1¼" eyepieces. I took images through the ED80 with a Canon 10D digital SLR before and as the 17 day old Moon was rising. It has the focal length of 2032/F10 with X0. 3 reducer is designed to reduce the focal ratio of an f/10 SCT to f/6. It is not compatible with EdgeHD telescopes. Discover over 396 of our best selection of 1 on AliExpress. However, I was unable to reach a focus. 6 times more light per pixel. here is my setup using only 2 lenses Nex 6 (APS-C). So it provides a 0. Focal Reducers for Refractors. For example. The focal reducer is only for full frame lenses used in APS-C mode on the Sony full frame VG900, A7 and A7r. Threads into rear cell of any Meade SCT. The FC-100DZ is fully compatible with the accessories available used with the existing FC-100 telescopes, including the FC/FS Muli-flattener and the FC-35 0. Questar Zone, How to Service Videos. 3, the distance between the CCD and the back of the focal reducer element is a critical distance that will make a big difference in the image. Kipon did yet not unveil how much these will cost and when they will ship. The RC is heavier than an SCT of the same size, which also made me opt for the 6″ version instead of the larger 8″ (13 vs. 63x focal reducer ). 63x Focal Reducer/Coma Corrector Compared to former Starizona SCT Corrector models, this third installment has been given slight optical improvements to go along with standard M42 top thread for more convenient customization. 5x is threaded to screw onto any 1. However the focal reducer does not have to be installed, so the tall focal reducer style flange can be picked if the scope is to be used for both visual and imaging. 8 10-second subs calibrated with flats, darks, and bias frames, and stacked in DSS. 3 for C5, C6, C8, C9¼ and C11 telescopes and f/7 for the C14 telescope. 63 focal reducer/corrector that fixes spherical aberrations along the edge of the field of view and also makes the instrument faster- f/6. 3 Focal Reducer for Schmidt-Cassegrain Telescopes is a low-price option for reducing the focal length of your Schmidt-Cassegrain telescope from f/10 to f/6. This is due to, even after polar aligning and a two star alignment, at subs around 30 Secs i am still getting slight elongation to the stars. For an f/10 SCT telescope user , it is possible to achieve f/4 through the use of a combination of focal reducers. Focal Reducer Benefits: Posted on May 5, 2011, 1:23 pm Author: Jen Winter : Exploring the Focal Reducer in Visual Observations. In essence, despite Skywatcher not advertising their 2" Coma Corrector as changing anything, it does provide some focal reduction, as evidenced. That was (and still is) a cool little piece of gear, suffering from one disadvantage: it isn't compatible with the Metabones Speedbooster. This added back focus allows use of the FC-35RD reducer, which converts the DF to an f/5. 4 instrument. I wonder if this one has the same optics as the RJ camera models. With FC-35 reducer, this telescope becomes an excellent imaging system, illuminating a full frame chip at f/5. Alternatively you could purchase a screw on focal reducer and field flattener. ) There are two other sites that you may also find helpful for CCD cameras. 0 ND110 Vs Camdiox ND1000. 3 Focal Reducer (Brand New). 63x Reducer 0. F/8 is unusual, but not unheard of and I know meade has made them for a few years now. 25″ webcam nosepiece and provides a nominal reduction in magnification of 0. Ted Agos of the Acorn Hollow Observatory has designed this retrofit kit for converting any standard Celestron f/6. 3 Focal Reducer/Field Flattener. 9Mb: An extensive test using my ED80 APO refractor, visually comparing the effect of different focal ratios and different integration times. Compare this measurement with the manufacture value. 01 (object at 100ƒ 1, or 40m) is 0. 3 SCT focal reducer/corrector. Re: a comparison: with & without focal reducer on a C8 SCT Post by bobharmony » Wed Oct 07, 2020 4:29 pm Agreed, the FR version has better color and nice detail to my eye. Another good SCT focal reducer is made by Hirsh; however, the Celestron seems to get better reviews. This anodized, machined aluminum 1. In comparison to conventional crayford or rack & pinion drives, this micro-geared movement has zero backlash, zero cogging, and zero flxure ; Diamond Steeltrack 2" focusers lift a payload of 6kg (13 lbs) straight up, without slipping, without excessive bearing preload (bearing preload can be increased further if necessary). Celestron Nexstar 6SE, stock alt/az mount, Meade. 73x is has been designed by Dipl. 3 Focal Reducers for Compound Telescopes. 0 using the older Celestron focal reducer. A high-quality, non-focal-reducing Field Flattener optimised for DSLR imaging on refractor telescopes with focal ratios around f/5. It reduces the focal length of the Newtonian and increases speed together with field correction at the same time. 3 SCT Focal Reducer £84. Corrective optics are a very important component, especially in astrophotography. 93 primary mirror and f/6. 3 for C5, C6, C8, C9¼ and C11 telescopes and f/7 for the C14 telescope. A T to 2" adapter fits to this - the one shown is an Antares T to SCT female to SCT male to 2" focuser - this type allows you to couple in a standard SCT focal reducer, i. There's nothing the C6 does that the C8 can't do better except provide a wider field of view, but that's what focal reducers are for. 24---Eyepiece Adapter for Celestron/Meade 6. 4mm) and a focal length of 1000mm, your focal ratio is 1000/152. Afocal adapter for point and shoot camera. 5 SCT Corrector design; 27mm image circle; 2" barrel; Threaded for 48mm filters; SCT Corrector Top Thread: M42 x 0. Threads into rear cell of any Meade SCT. 678 694 1134 [email protected] 3 on an f/10 SCT. The specifications for focal length and aperture are measurements given in inches or millimeters (or both), while the focal ratio is calculated by dividing the focal length by the aperture. This is especially useful for SCT and MCT owners, since this types of telescopes normally have a focal ratio above f/10. 25 with the f6. 7x Focal Reducer shortens the field curvature, and suffered from severe vignetting. Drop a Meade Series 4000 56mm Plossl 2" eyepiece (52-degree AFOV) in our 800mm telescope and the true field of view is a whopping 3. Ideal for cleaning All MallinCam focal reducers including MFR-5, MFR-3, 0. As it's name implies, it is a large and substantially constructed device which weighs nearly 2-1/2 lbs with the lens installed. La version française de Astronomie Plus est présentement en cours de traduction. And I'd be lying if I said I haven't been checking out ads for used C9. CRAB NEBULA, M1 Taken December 26, 2016 EQUIPMEMT Telescope: Celestron 14” SCT,. This is a bit pricey, but the change in f/ratio from about f/6 to f/2 means you will capture more than eight times the photons in your 30 second sub-exposure as you would with the same camera on an f/6 system. 3 Focal Reducer/Field Flattener #07545. Dylan, If you have an older C925 then the reducer (x0. 2 in the C11, for a speed increase of 2. 72x Focal Reducer on the Blackmagic Design Pocket Cinema Camera. This makes deep-sky photography with astro cameras possible. 3 focal reducer when added to one's imaging train, (my Canon 450D in the diagram) I comprised the above illustration. A positive focal length indicates that a system converges light, while a negative focal length indicates that the system diverges light. 3 Focal Reducer, as shown below, an f/10 SCT acts at f/6. 72x 35 Optical, mechanical, and cosmetic condition are all excellent. 7 inch rack and pinion focuser. Methods We retrospectively included pediatric cancer survivors who had new liver lesions detected during surveillance imaging and who were diagnosed with FNH-like lesions by Gd-EOB-DTPA. Integral T-Ring adaptor thread. Camera: Digital Rebel Xt (350D). 73x is has been designed by Dipl. If offers wide fields of view with any Schmidt-Cassegrain telescope. Even faster astro-photographs with this VSD 100 apochromat focal reducer: The focal length is reduced to 300mm. Mixed results as the reducer would probably have more effect on perhaps a Mak or SCT with 1500mm or more focal length. Comparison of Vesta Pro and 1004x using standard exposures. I have been fortunate to have a TEC 140 APO refractor for imaging. With this reducer lens installed, you can use all EdgeHD optics at f/10, f/7, and f/2 for incredible versatility. I first did some visual tests with the focal reducers on the 8" LX200-ACF. 25", 11", and 14" maintain the full 146mm back focus, making it easy to switch the reducer in and out of image trains as desired All EdgeHD scopes cover a full-frame DSLR at native focal ratio, and all but the 8" will cover the same field with the 0. These f/ratios cover many important applications and represent a best case scenario to a worst case scenario. Scope: 8" sct, 6. They flatten the image field, shorten the focal length or correct system-related image errors. This ensures the best optical performance. The Starizona Night Owl is a 4-element reducer designed to increase the field of view on standard SCT telescopes (not EdgeHD or ACF models) by 2. Methods We retrospectively included pediatric cancer survivors who had new liver lesions detected during surveillance imaging and who were diagnosed with FNH-like lesions by Gd-EOB-DTPA. (This isn't to say that the AP reducer is bad, just not particularly optimized, apparently, for use with an RC. The left row of components are my focal reducers (and the SCT to T-Thread adapter). Maybe I will need the Hoteck laser collimator system at $450. 25" Orthscopic Eyepieces 12 & 18 mm: Olympus 3020 Digital Camera: 2" 30mm 1rpt ST80: Meade F3. Starizona has updated their popular SCT Corrector! By modifying the optical design of the SCT Corrector based on the 4-element design of the large-format SCT Corrector LF model, they were able to increase the focal reduction from f/7. Focal Reducer Speed Booter M42 to M43 Detail Add to Wish List. 3 focal reducer for ccd imaging click here. Focal reducers for wider field imaging and visual applications. May be used to increade field of view and reduce magnification for visual applications. There are M48 threads on the telescope side for using a standard 2" filter. Focal Reducer for SCT - ACF. 0 using the older Celestron focal reducer. ♦ Connects through a standard 2" filter thread. I fitted it as first object on the scope before putting the microfocuser on top, since that was the only way that any connector screw threads seemed to work. 3 Focal Reducer, as shown below, an f/10 SCT acts at f/6. This is a fantastic product and probably some of the best money spent on a Schmidt Cassegrai. 3 for C5, C8, C9¼ and C11 telescopes and f/7. Philipp Keller (Germany). Also present in the system are: (d) means to correct the sum of the spherical aberation of all the spherical mirros in the entire system and (e) an aperture stop. Samyang 10 mm f2. Hi all,Ive been looking into focal reducers for my LX200 10inch (ACF). This clever accessory makes it possible to have a dual focal ratio instrument, without sacrificing image quality. 22 Item(s). The real focal length of the optical system obtained by adding this focal reducer on top of the 31. Improves edge-of-field correction and reduces exposure times by close to 50%. Includes brass compression ring with thumbscrew. pdf - The Borg EDF4 focal reducer, part number 7704, is designed for use as a photographic field reducer for digital sensors up to 35mm film-frame size (24x36mm). 2 in the C11 and the speed is increased 1. For Sale - Sold: Focal Reducer Speed Booster Adapter Pentax K PK Lens to Micro 4/3: vytasn: Sold Items: 2: 07-05-2018 02:39 PM: m42 to Pentax K focal reducer: raff89: Pentax SLR Lens Discussion: 19: 01-13-2016 04:11 PM: Pentax Q and Focal Reducer: ripper2860: Pentax Q: 23: 12-27-2015 12:26 PM: $199 focal reducer speed booster adapter Pentax PK. The focal reducer converts the 12. The 2" SCT thread is, in fact, generally considered as a "standard" SCT thread since virtually all SCT diagonals and most other accessories such as focal reducers or SCT prime-focus imaging adapters use this thread. 6-degrees! Short focal length, high magnification eyepieces are more common in 1.